Foot-power hammer.



'PATENTED APR. 14, 1908.

A. H. WERTZ. FOOT POWER HAMMER. APPLIOATION FILED SEPT.26,1906.

Z i m M 1H: uumws Pia-ins 00 vusnmdron. o. c.

UNITED STATES AUGUST H. WE RTZ, OF KANSAS CITY, KANSAS.

FOOT-POWER HAMMER.

No. scenes.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed September 26, 1906. Serial No. 336,318.

T 0 all whom it may concern:

Be it known that I, AUeUs'r H. Wnnrz, a citizen of the United States, residing at Kansas City, in the county of \Nyandotte and State of Kansas, have invented new and useful Improvements in Foot-Power Hammers, of which the following is a specification.

This invention relates to foot-power hammers, and aims to provide a hammer of such class in a manner as hereinafter set forth specially adapted for the use of blacksmiths, and which may be conveniently arranged for anvil work.

The invention further aims to provide a foot power hammer with means, as hereinafter set forth, whereby the angle in which the face of the hammer strikes the material can be regulated, and furthermore to provide the hammer with means whereby the leverage of the operating lever can be regulated so as to impart a quick or a slow blow to the hammer as is desired.

The invention furtheraims to provide a foot power hammer which shall be simple in its construction, strong, durable, efficient in its use, conveniently operated, readily set up with respect to an anvil and comparatively inexpensive to manufacture.

With the foregoing and other objects in View, the invention consists of the novel construction, combination and arrangement of parts hereinafter more specifically described, illustrated in the accompanying drawings,

which form a part of this specification and wherein is shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In describing the invention in detail reference is bad to the accompanying drawings, wherein like reference characters denote corresponding parts throughout the several views, and in which Figure lis a side elevation of a foot power hammer in accordance with this invention. Fig. 2 is a section on line 2*2 of Fig. 1, looking to the rear, and, Fig. 3 is a detail view.

Referring to the drawings the hammer comprises a swinging frame formed of a pair of uprights, 1, 2, each of which is bent laterally at its lower end and pivotally connected member 10 are as at 3, to a fixed support formed of a pair of angle-irons 4 and a U-shaped iron 5.

The hold-fast devices for securing the irons 4, 5 are indicated by the reference character 6. The uprights 1, 2 are spaced apart and l reinforced through the medium of the cross bars 7, which are secured in position by the tie-bolts 8 and nuts 9. Secured to the uprights 1, 2 at a point above the upper of the cross bars 7, is a U-shaped member 10, having the arms 11 thereof extending forwardly and at the outer side of the uprights. The arms 11 of the member 10 are secured to the uprights through the medium of the holdfast devices 12. The arms 11 of the U- shaped member constitute stops for a pair of adjustable slides 13 and the body portion of said U -shaped member forms a support for a vertically-extending and rearwardlycurved arm 14, which constitutes a fulcrum for a purpose to be hereinafter referred to.

The uprights 1, 2 above the arms 11 of the bifurcated, as at 15, and the slides 13 are carried by the bifurcated ends of the uprights. The slides are slotted, as at 16, so as to straddle said bifurcated ends of the uprights. The slides 13 carry the shaft 16 upon which is pivotally mounted the hammer arm 17. The latter is provided with a depending portion 18, which 1s slotted and through the said slot the shaft 16 extends. This depending portion is termed the knee of the arm of the hammer and is an integral portion of the hammer arm 17.

A pair of brace members is secured to the hammer arm 17. The brace members are indicated by the reference character 20 and are secured to each side of the hammer arm, as at 21, and are mounted upon the shaft 16 and interposed between each of the brace members 20 and the knee 18 and mounted upon the shaft 16, are spacing collars 22. Said collars 22 retain the knee of the hammer centrally of the shaft 16-.

The hammer is indicated by the reference character 23 and is secured in any desirable manner to the hammer arm.

The operating lever for the hammer arm is formed of two members 24, 25, which, intermediate their ends, abut and are suitably secured together, and the forward portions of the members24, 25 are bent away from each have secured thereto a foot tread 27. The

other, as at 26, so as to straddle the anvil and the outer ends of the said members 24, 25

rear portions of the members 24, 25 are also bent outwardly so as to straddle the uprights 1, 2, as at 28, and the said portions 28 of the operating lever are secured to the uprights 1, l 2 by the hold-fast devices 29. The intermediate portion of the operating lever is formed with a series of openings 30 to permit of ad- I justably connecting thereto a coupling piece 31 by means of the attaching device 32. j

The coupling piece 31 is adapted to couple to the operating lever a U-shaped member 33, which terminates in an expandible spring 34, the latter at its upper end terminating in an inverted U shaped member 35, which straddles the hammer arm 17 and is adapted to be mounted upon a corrugated spring 36. By such an arrangement the member 35 can be shifted rearwardly or forwardly upon the hammer arm 17 and retained in such position.

The providing of the adjustable coupling piece 31 permits of increasing or decreasing the leverage of the operating lever so that if the leverage is decreased the blow will be slow, but if the leverage is increased the blow of the hammer will be quicker.

Secured to the uprights 1, 2, near the lower portion thereof through the medium of the hold-fast devices 37, is a rearwardly-extending bracket 38 having connected thereto an adjustable bolt 39, which constitutes a ten sioning means for a coiled spring 40, the latter being connected at its lower end to said bolt 39 and at its upper end to the rear end of the hammer arm as at 41. Forwardly of the hammer-returning spring mer arm 17 has attached thereto, as at 42, an additional hammer-returning spring 43, which has its lower end connected to a ten sioning device 44, attached to a cross bar carried by the frame of the hammer. The function of the springs 40 and 43 is to return the hammer to inoperative position after the blow has been struck.

Projecting forwardly from the uprights 1, 2 is a yoke-shaped. member 45, which is connected by a screw-threaded bolt 46 to a support 47, secured to the anvil support, and upon the bolt 46 is mounted a take-up arm 48, the purpose of which is to move the frame towards or away from the anvil so that the I hammer will strike near the front or near the j rear of or intermediate the anvil, as the case may require. j

The function of the arm 14 is to act as a 1 fulcrum for the knee 18 when it is desired to I adjust the hammer arm so as to regulate the angle in which the face of the hammer strikes the material, such regulation of the hammer beingobtained by elevating the shaft 16. If the hammer is moved rearwardly and. the

40, the ham- 4 knee 18 fulcrums upon the arm 14 it is 6V1: dent that the slides will move in a vertical direction, consequently raising the hammer arm. When the slides 13 are adjusted vertically they are retained in such position through the medium of a key 49, which is inserted through the bifurcated ends of the uprights and which rests upon the arms 11 of the member 10, and the said key 49 constitutes a means to support the slides 13 in their elevated positions. Various sized keys may be employed. When the hammer is set up in operative position the foot tread 26 is os'itioned generally about seven inches a ove the floor and in convenient reach of the operators foot.

It is thought that the many advantages of a foot power hammer constructed in accord- -ance with the foregoing description, taken in connection with the accompanying drawings, are well understood, but it will be stated that such construction will enable one to obtain a large range of adjustment and can strike with greater or less force, according to the nature of the work.

The various springs cushion the hammer in such a manner that it relieves the jar on the foot when operating the machine and also the jar on the mechanism, and furthermore the construction is such that it will cause very effective blows to be given without.

damage to the machine or injury to the operator. Owing to the manner in which the operating lever is accessible from either side or from the front of the anvil, no matter where pressure is applied to the foot lever, the power will be applied centrally.

What I claim is 1. A foot power hammer comprising a frame having each of the side members thereof formed with a bifurcated upper end, a verticallyadjustable slide mounted in and straddling the bifurcated upper end of each of said side members, a hammer arm pivotally connected to said slides and provided with a hammer head, a removable means extending through the bifurcated upper ends of the said side members for retaining the slides in their adjusted positions, and an operating lever connected with the hammer arm and to the frame.

2. A foot power hammer comprising a frame, vertically adjustable slides carried thereby, a hammer arm pivotally connected to the slides and provided with a hammer head, a removable means extending through the frame for retaining the slides in their adjusted position, an operating lever connected to the frame and to the hammer, and means attached to the frame and to the hammer arm for automatically returning the hammer arm to normal position.

3. A foot power hammer comprising a frame, vertically adjustable slides carried by 'In testimony whereof I have hereunto set the top of the frame, a hammer arm pivotally my hand in presence of two subscribing wit- 10 connected to said slidesband provided Wish a nesses.

hammer head, remova e means eXten ing r 5 through the top of the frame for retaining AUGUST the slides in their adjusted position, and an Witnesses:

operating lever connected with the hammer G. B. BAXTER,

arm and to the frame. J. H. BAXTER. 

